The 12EA6 is a screened amplifier pentode designed in 1957 for use on vehicle battery supplies for car radios. The main design purpose was for use as an IF amplifier.
The valve was supplied by General Motors under the Delco brand but was made elsewhere.
The notch in the anode reveals the three wire grids. They all pass straight across the cathode.
As expected the valve was made in the USA. The control grid support rode are made of Copper.
The Delco brand identification.
The thin glass tube envelope is 18 mm in diameter, and excluding the B7G base pins is 46 mm tall.
Reference: Data-sheet. Type 12EA6 was first introduced in 1957. See also1957 adverts.
